Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Michael Zimmerman, MD

Individual provider Surgery Physician · NPI 1477579902

Michael Zimmerman, MD practises General Surgery in Milwaukee, Wisconsin. Graduated from University of California, San Francisco School of Medicine in 1997, 29 years ago. Practices with University of Utah Adult Services, a 1,740-clinician group and accepts Medicare assignment. Licensed in Colorado and Wisconsin.

Years since qualifying
29
Trained at
University of California, San Francisco School of Medicine
Licensed in
CO, WI
In the registry since
2006
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

9200 W Wisconsin Ave Transplant Surgery
Milwaukee, WI 53226-3522
Phone: (414) 955-6920
Fax: (414) 955-6222
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Transplant Surgery Physician (primary) Taxonomy 204F00000X · Licence 62843 (WI)
Surgery Physician Taxonomy 208600000X · Licence 62843 (WI)
Surgery Physician Taxonomy 208600000X · Licence 44600 (CO)

Record details

NPI number1477579902
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 15, 2006
Last updated in NPPESJuly 8, 2022
Certification dateJuly 8, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGENERAL SURGERY
Medical schoolUNIVERSITY OF CALIFORNIA, SAN FRANCISCO SCHOOL OF MEDICINE
Graduated 1997 (29 years in practice)
Group practice University Of Utah Adult Services — 1740 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients36
Services billed 58 a service is one billed item, such as a visit, a test or a procedure
Average patient age57

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Travel and Lodging $1,333 2 payments · travel or lodging paid or reimbursed, such as to attend a conference

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at University of Utah Adult Services

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1740 clinicians in the practice; 12 are shown here.

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